Problem 6-8

Safety regulations require that the time between airplane takeoffs (on the same runway) will be at least 2 minutes. When taking off, the run time of an airplane on the runway is 36 seconds. Planes are on average waiting 3 minutes and 30 seconds for take-off. On average there are 18 planes taking off per hour. How many planes are either on the runway or waiting to take off? (Round your answer to 2 decimal places.)

Number of airplanes ___________

Problem 6-11

Money Laundry has 25 washers and 38 dryers. All orders are first sent to wash and then to dry. It takes on average 38 minutes to wash one order and 55 minutes to dry.

a. What is the capacity of the washing stage? (Round your answer to 2 decimal places.)

Capacity of washing stage 39.47 orders per hour

b. What is the capacity of the drying stage? (Round your answer to 2 decimal places.)

Capacity of drying stage 41.45 orders per hour

c. Identify the bottleneck(s).

Washer or Dryer

d. What is the capacity of Money laundry? (Round your answer to 2 decimal places.)

Capacity of Money laundry 40.65 orders per hour

e. If Money Laundry would like to increase the capacity by buying one more machine, should they buy a washer or a dryer?

Washer or Dryer?

For the Problem 6-11. You only need to double check if my work is right. Thanks. I WILL UPVOTE FOR SURE.